Spin and Parity of the Higgs Boson Near $m_H = 126 \ \textrm{GeV/c}^2$ in the $H \to ZZ\to 4\ell$ Channel and a Search for a Doubly Charged Higgs with the CMS Detector at the LHC

Presented here is an analysis of the spin and parity of the Higgs-like boson near 126 GeV inthe ZZ decay channel where the Z bosons decay into two muons or electrons. The analysisutilizes 19.7 fb−1 of 8 TeV proton-proton collision data recorded by the CMS experiment.The Standard Model pure-scalar hypothesis is compared against four alternate spin-parityhypotheses utilizing an angles-only technique. The data are consistent with the StandardModel expectations, and the pseudoscalar hypothesis is excluded at the 95% confidencelevel.Additionally, we present a search for a doubly charged Higgs boson, which alsoutilizes 19.7 fb−1 of 8 TeV proton-proton collision data recorded by CMS. The doublycharged Higgs is a member of an SU (2)L scalar triplet, and is a Type II “seesaw” mechanism.We search for a four-lepton final state from Drell-Yan pair production of two left-handeddoubly charged Higgs bosons. The branching ratio of the doubly charged Higgs is notdetermined by the model, so we consider a variety of possible branching ratio scenarios.No excess is observed compared to the background prediction. Lower limits on the doublycharged Higgs mass range from 388 to 585 GeV at the 95% confidence level, depending onthe branching ratio scenario.